The human body adapts to exercising in the heat by increasing plasma volume, decreasing core temperature, decreasing heart rate, and increasing the rate of sweating. How soon do these changes occur?

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Adaptations to exercising in the heat can take place as early as 9-14 days after the beginning of acclimation. An increase in the body's plasma volume occurs first, followed by a decrease in both core temperature and heart rate. Lastly, the body "learns" to sweat more. The wise Group Fitness Instructor (GFI) will cue participants to drink more fluids and dress appropriately (loose fitting clothing, no cotton, light colors) especially during the early phase of adaptation.

The Human Body Adapts to Exercising in the Heat by Increasing